春运的英语表达为：(passenger)transport during the Spring Festival period
客运量 volume of passenger transport
客运列车 passenger train
客流高峰期 peak time for passenger transport
加开列车 operate / arrange extra trains
开通24小时售票窗口 open 24-hour ticket sales windows
集体预定火车票 group ticket-booking
送票上门 deliver train tickets to the doorsteps
规范售票 regulate ticket sale
打击票贩子 crack down on scalpers
缓解交通压力 ease the traffic pressure
The volume of passenger traffic reaches its climax before and after the Spring Festival.
The train ticket prices will not be raised during the Spring Festival period this year.
Most of the passengers are college students on their winter vacation and migrant workers returning home for Spring Festival.
Passenger flows will be concentrated in Beijing, Guangzhou, Chongqing, Wuhan and some other cities.